Lock.



PATBNTED Nov. 10,1903.

lE. H, DIMO-CK.

1.00K. APPLIUATIGN FILED DEO. 28.*1901.

2 SHEETS-SHEET 1.

IF0 HDD l l r l atten/ws36 No. 743,695. l l PATENT-ED Nov. 1o, 1903,

E. H. DIMocK. v f' LUCK.l

APPLICATION FILED DEG. 26I 1901. No IoDEL. z sHBETs-sHBm 2.

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Wim v l1/wanton Wm g @ZM MMM Z K Y I ./dlazmyg UNITED STATES PatentedNovember. 10, 1903.

PATENT GEEiCE.

LOCK.

' SPECIFICATION forming part of Letters Patent No. 743,695, datedNovember 10, 1903. Application iiled December 26, 1901i Serial No-87,149. (No model.)

To a/Z whom it may con/cern.-

Be it known that I, FLWINA H. D1MocK,.a citizen of the United States ofAmerica, residing at Dorchester, in the county of Suolk and State'of-Massachusetts, have invented new and useful Improvements in Locks,of

.which the following is a specification.

from outside of the lock and in the improve` ment of the latch-bolt anddead-bolt construction and in certain novel combinations of these boltswith the cylinder-lock, all as fully described in the followingspecilication Y and embodied and dened in the claims appended thereto.

In the drawings forming part of this speci'- iication, Figure 1 is aside elevation of a lock with the side plate removed embodying myinvention. Fig. 2 is a front edge elevation of Fig. 1. Fig. 3 is asectional view taken on line 3,-Fig. l, through the cylinder-lock andshowing, partly in section, the means for retaining said lock in thelock-case. Fig. 4 is a perspective view of a leverV on the deadbolt. YFig. 5 is a View of a portion of the under side of the removable sideplateot the lock-case, showing thereon the means for securing thecylinder-lock in said case. Fig. 6 is a vertical section on line 6 6,Fig. 1. Fig. 7 is a detailed view of the upper right-hand corner of thelock and comprises the end of the dead-bolt and one of its lockingdevices.

Referring to the drawings, which comprise, for the sake of clearness, aside elevation and vertical section of a complete lock, a indicates thecase, having one removable side b, within which case is located theusual spindle c, the latch-bolt d, the dead-bolt e, and

the cylinder-lock f, operated by a key from` the outside of the lockonly and whereby the dead-bolt and its lockinglever may be operated topermit the opening of the door. The spindle c is provided with the hubsg, which operate the plate h, on which there is pivotally hung the leverc', whereby the latch- ;bolt'd is retracted. This mechanism, aside fromthe latch-bolt, does not form part of this application.

The dead-bolt e is supported in the usual manner for transverse slidingmovements in the case and has pivoted to one side thereof atj alocking-lever la. (Shown in dotted lines only in Fig. l and' inperspective in Fig. 4..) ,On one end of this lever there is a projectionl, having a beveled or rounded edge, whichA is adapted to engage with afixed projection fm., having preferably beveled edges, which projectionextends up through a horizontal slot n in the dead-bolt. The lever it isprovided With a spring o, which is adapted to force said projectionZdown by the side of the projection m, on either side thereof, accordingto the position of the bolt. The opposite end of said lever lo is bentat right angles to its body and lies within a notch p in the upper edgeof the dead-bolt c in position to be engaged and depressed either by thearm q on the thumb-bolt r or by the arm s on the plug of thecylinder-lockf. In Fig. 6 the relative positions of these two arms q ands and theV locking-lever k are clearly shown, and in Fig. 7 the positionof the arm q relative to said lever 7i: is shown, the cylinderlock beingremoved. When either of said arms q and s is rotated, the end of thelever k will be depressed and the projection l on the opposite endthereof will be raised sufficiently to permit it to pass over theprojection m on the lock-case. The continued rotation of said arms g ands will bring them into engagement with the end of the notch p, wherebythe dead-bolt e can be moved.` As

'soon as the projection Z has passed over the narrow upper end of therst projection m,

the spring o, forcing the beveled end ofthe projection Z downward, willby the engagement of the beveled or rounded edges on said projectionmove the bolt e to the limit of its outward movement and hold it there,and the eiect is the same in whichever direction said bolt may be moved.

On top of the dead-bolt there is pivoted at t a lever to, whose upperend, which is turned at right angles to the body, lies in the path'ofmovement of the arm s, and whose opposite extremity engages the upturnedend of a bolt c, operatively-engagin g the latch-bolt ci. As-

ICO

vss

'tained in position.

su ming the dead-'bolt to be turned to lock the door, if a key beinserted in the cylinder-lock and the plug is turned, carrying with itthe arm s, the latter will first depress the rear end of the lever 7c,lying within the notch p of the dead-bolt e, and then striking againstthe rear edge of said notch shoot the bolt rearwardly, carrying with itthe lever u, the key being turned to the left from the position of thecylinder-lock shown in Fig. 6. At the limit of the rearward movement; ofthe dead-bolt e the arm s will pass out ofv the notch p in the latter,and its continued rotation will cause it to'strike against the inturnedupper end of the lever tt, which by the retraction of the dead-bolt hasbeen brought into the path of rotation of said arm, and the contact ofthe latter with said lever will cause the latter to retract the bolt o,which operates the latch-bo1t d.

The deadbolt e may be operated by the thumb-knob from the inside of thedoor in the same manner that said bolt is operated by the cylinder-lockfrom the outside, and by means to be described farther on said bolt emay be blocked by means of the thumb-knob to prevent the'operation ofthe said bolt by means of the cylinder-lock.

OrdinarilyY in lock constructions vof this character the cylinder orcasing which car- 'ries the separate key-operated mechanism (and whichwill be hereinafter referred to as the cylinder-lock has been secured byscrewing it into an opening in the lock-casing, or it has been slidablyfitted into such an opening, and whether screwed in or otherwise it hasbeen secured in position by some suitable means, as a screw.

In the construction herein shown the cylinder-lock is adapted to bepushed back into position in the lock-case from the outside of the door,and arranged within the lock-case is a pawl or detent spring-heldagainst the side of the cylinder-lock and adapted to engage a notch onthe latter, whereby it is re- This detent or pawl is operable only fromthe face of the lock and permits the cylinder-lock to be slidably fittedinto the lock-casing, but prevents its withdrawal therefrom. Theselock-retaining devices are clearly shown in Figs. 1, 3, and 5 and areconstructed as follows: The body of the cylinder-lock, as shown in thepartial section in Fig. 1, is provided with two parallel 'flat sides, inwhich, as shown in Fig. V3, there are angular notches, with which thepawl-levers w, hung on the plate or removable side l) of the lock-case,may engage. These pawllevers have a rocking motion toward and from theflattened sides of the cylinder-lockfand are connected by the arms and ywith an operating screw-rod z, the latter, as shown in Fig. l,projecting through the face of the lock, the arm y engaging theextremity of the screw-rod e' by a fork connection therewith, and thearm m having a screw-threaded engagement with said rod e, and betweenthe end of the arm y and the end of the arm is a spring 2, adapted topress the ends of these arms apart. The spring 2 when the rod ,z isscrewed outwardly is compressed, and when the rod is rotated in theopposite direction the reaction of the spring operates to force thatpawl-lever to which the arm y is attached against one side of thecylinder-lock, and by pressure in the opposite direction against the endof the arm a: (the rod z beingr movable endwise through the face of thelock) the opposite pawl-lever, attached to said arm :I: by a crank-arm3, is forced against the opposite side of the cylinder-lock, bothpawl-levers w being thus spring-held in engagement with the sides ofsaid lock with a force proportionate to the compression of the spring 2.

In practice the flattened sides of the lock will be provided with anumber of parallel A grooves, to the end that said lock maybe fitted todoors of varying thicknesses.

On the dead-bolt e is located a lug 4. (See Fig. 7.)

latter has been thrown if the thumb-knob has described half a revolutionthe arm q thereon will then nd itself in a position opposite to thatshown in Fig. 7, its end lying in close proximity to the vertical edgeof the lug 4, positively blocking the return of the dead-bolt. Anysuitable means, as the spring 5, for example, (shown in Fig. 7 in dottedlines,) which engages a notch in the hub of the arm q, may be employedto hold the thumb-knob in the desired position. As long as the arm qremains in the position described When the thumb-knob is turned to throwthe dead-bolt,'as described, after the IOO the deadbolt cannot bemanipulated ,by

means of a key inserted in the cylinder-lock outside the door. If,however, the thumbknob' be constructed to complete one revolution afterhaving moved the bolt e into locking position, then the operation of thecylinder-lock would retract the dead-bolt. The thumb knob may beconstructed to make either a half or full revolution, as desired.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

1. In a lock, a dead-bolt, a lever thereon for positively holding saidbolt in an extended or retracted position, a thumb-knob, and akey-operated mechanism for independently operating said bolt fromopposite sides of a door, and means on said thumb knob for holding saidbolt against operation by said key -operated mechanism, in combinationwith a latch-bolt, and a suitable connection between the latter and saiddead-bolt, whereby both of said bolts maybe retracted, or saidlatch-bolt alone, by the key-operated mechanism only.

2. The combination in a lock or latch, of a separate key-operatedmechanism for operating a bolt of saidlock, and means for removablysecuring said mechanism in the lock, consisting of two pawl leversadapted to swing one toward the other, grooves in oppo- IIO site sidesof the casing of said key-operated mechanism with which said paWl-leversengage, and means operated from the face of the lock for holding saidpaWl-levers in engagement with said grooves.

3. The combination in a lock or latch, of a separate key-operatedmechanism, located in a suitable casing, to operate a bolt of said lock,said casing being adapted to be slidably inserted in an opening in thelock; a member operable independently of the lock mechanism andsupported on the lock to yieldingly engage said casing to permit endwisemovement of the latter in one direction only.

4. The combination in a lock, of a separate key-operated mechanism foroperatinga bolt

